I'm planning to leave Saint-Herblain, and go to the point by the bac de Loire in Coueron, and to follow the Canal de la Martinière to the point, then come back by the road from Paimboeuf to Nantes and the Pont de Cheviré.

I left Saint-Herblain on time, took the bac in Coueron, and made my way along the canal,
only to find a bridge too weak to support my car. I left my car and made the last kilometer
on foot. It was cold and windy...

As I suspected the field was full of water. The whole area is a swamp in winter: it's the flood
plain of the Loire river.